Controlling the rotation modes of hematite nanospindles using dynamic magnetic fields† † Electronic supplementary information (ESI) available: Details of nanoparticle synthesis and characterization. See https://doi.org/10.1039/d2na00522k

ABSTRACT: The magnetic field-induced actuation of colloidal nanoparticles has enabled tremendous recent progress towards microrobots, suitable for a variety of applications including targeted drug delivery, environmental remediation, or minimally invasive surgery. Further size reduction to the nanoscale requires enhanced control of orientation and locomotion to overcome dominating viscous properties. Here, control of the coherent precession of hematite spindles via a dynamic magnetic field is demonstrated using nanoscale particles. Time-resolved small-angle scattering and optical transmission measurements reveal a clear frequency-dependent variation of orientation and rotation of an entire ensemble of non-interacting hematite nanospindles. The different motion mechanisms by nanoscale spindles in bul

SUBMITTER: Honecker D 

PROVIDER: S-EPMC9595103 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature